Improvement in grinding-mills



I' /l/ 5 @l I (1, 1 c/l 0 w JL , ll ll s z 1 E s l s f N. FETES, FHOTO-LITNOGRAFHER. WASHINGTON. D, C. v

products of the mill. a of the stone case rests on the bed-plate A,

.UNITED STATns PATENT AMBRosn4 W. sTRAUB, on PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN GRlNDING-MILLS,

i Specification forming part ofLetters Patent No. 186,440, dated January 23, 1877; application tiled v August 5, 187e.

To all whom it may concern.-

Be it known that I, AMBRosE `W. STRAUB, .of the city of` Philadelphia, in the State of Pennsylvania, have invented a new and usefnl Improvement in Portable Grinding-Mills; and 1 do hereby declare that the following is t afull, clear, and exact description of said improvement, reference'being had to the accompanying drawing', in which-- `Figure l is a perspective view of one of my l improved mills in `condition for immediate use Fig. 2, a vertical longitudinal4 central section of Fig. l; and Fig. 3, a face view ofthe stationary stone as secured fast in a castiron 7 ring, which is adapted to be bolted fast to the enti of the stone case of the bedplate of the `mi l.

The object of my invention is to afford to farmers and others a good, cheap, durable,`

i horizontally upon four cast-iron 1egs,a.", which' are bolted firmly tothe underside of A. The French burrstones B B' are supported ver- `tically, the rotary one, B, upon the horizontalshaft C, and the other, B', in a stationary manner, by means of a flanged ring, b", cast i around fast to the stone and bolted to the adjoining end of the sunken cavity, which forms the lower half a' of the case for the stones. l The stationary stone B' has a large central hole, through which the shaft (l passes freely, the inside of said hole being provided with spirally-arranged `cast-iron pins l l l l, Whichco-operate With like spiral-pins 2 on this part of the `shaft C, to carry the feed forward to the grinding-surfaces of thetwo stones bythe rotary motions of the said shaft. The

shaft is supported in journal-boxesc' c' at the respective ends of the bed-plate A, and has an over-necked band-pulley, o", fixed at one end, and is adjusted longitudinally by a temper-screw, 0"', at the journal-box of the other end, to regulate the degrees of fineness in the The hood or upper half with a lead joint between. It has a large hole in its top, through Which'theoperatorcan readily see when the stones are in tram. This hole is adjustably covered by the usual nameplate. The hopper D rests upon the stool E,

and this latter is xed on the top of the hoodV ad". The bottom ofthe hopper has an adjustable valve, d', to control its discharge, and under the hopper hangs the feed-shoe e', which is agitated in front by a cam, 4, on the shaft C, with which it is connected by an adjustable bit'urcated bar, 5. The inclination of the shoe e is adjusted by means of a screw bolt and nut, 6, in the end ofthe shoe, which screw-nut bears against the bifurcated bar 5. The feed passes from the shoe down through a trunk, F, in which it comes into contact with a pair of spirally-arranged cutters, 7 7, which also serve to direct the feed into the eye of the stone B', the said cutters being fixed on the shaft C. Near the inner side of each of the pillow-blocks, on which the shaft G rests there is a large opening, w, made through the bedplate A for any grit which may work out of the case to fall to the floor, and thus prevent it from getting into the journal-boxes. Fixed across the perimeter of the stationary stone B is a projecting bar, 8, which extends across the perimeter of the rotating stone B, and nearly in contact with the latter, for the purpose of clearing the saidV perimeter of stone B from adhesions, while a like bar, 9, is fixed to the perimeter of said rotating stone, so as to extend across its perimeter and pass over the bar 8 during the rotary motions of said stone, for the purpose of clearing the surrounding inside Isurface of the case from adhesions. The stones B B' are trammed by means of three set-screws (not shown) in the end of the lower halfa' of the case. The bottom of said lowerhalf of the case has an outlet-spout, l0, for the escape of the products of themill. The cutters 7 7 on the shaft C are of great. importance in grinding corn and cobs and similar articles used as food for cattle.

The Whole of this improved portable mill v is made of eastiron, with the exception of the Y tached from each other, and as easily united Trio.

together, which features are often of .impor-H of the portable farm-mills having the usual" cast-iron grinding-disks. The pulley c being over-necked, the band can be instantly applied or detached Without sewing or unsewing. The running-stone being fixed on the shaft, the mill runs as'steadily as a y-wheel, and, therefore, does not shake the building in which it may be running.

I claim as my invention-y 1. In a portable grindingmill', the bed-plate having the concave a' for receiving the lower halves of the two vertically-arranged burrv stones B and B', the pillow-blocks or bearings for the shaft C, the spout or outlet-opening 10, and the dirt-escape holes a1, all cast in one piece, substantially as set forth and described.

2; The Scrapers 8 and 9, in combination with the perimeters of the respective stonesl B and B', and arranged to operate simultaneously, as and for the purposes set forth and described.

3. In a portable grinding-mill, the combination, substantially as described,of the journalbearings o c and their removable caps, the dirtescape holes w, and the vertically-arranged stones B B.

AMBROSE W. STRAUB.

Witnesses: v

BENJ. Momson,

WM. H, MoRIsoN. 

